Seymour Martin Lipset (1922-2006) was professor emeritus of sociology at George Mason University. Among his books are American Exceptionalism: A Double-Edged Sword; North American Cultures: Values and Institutions in Canada and the United States; Political Man: The Social Bases of Politics; and Rebellion in the University. He had a long-standing interest in Israel and Jewish affairs, and was past president of the Association of American Scholars for Peace in the Middle East.